Insulator sleeve



FIG. 1 is a side view of the insulator sleeve in accordance with the invention shown on a coffee container, all side views are identical;

FIG. 2 is a top view thereof; and,

FIG. 3 is a bottom view thereof.

The container shown in broken lines represents environment only and forms no part of the claimed design. 

CLAIM The ornamental design of an insulator sleeve, as shown and described. 